/in/foo.c: In function 'main':
/in/foo.c:17:12: error: expected expression before ')' token
  for(i=0;i<)
            ^
/in/foo.c:5:8: warning: variable 'a' set but not used [-Wunused-but-set-variable]
  int n,a[100],i,m=3,x=1,sum;
        ^